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1
Direct Vent
Concentric Pipe Installation Instructions
Remove and discard screw from
1
concentric flue connection.
Remove exhaust adapter ring (discard for
2
concentric venting configurations).
Install the concentric vent. Ensure it
3
is properly seated.
Secure the vent pipe to the concentric flue
4
connection with the supplied screw.
Important: Install the venting termination according to the diagrams and instructions in
this manual. Slope the venting 1/4 in. per foot toward the appliance according to the vent
manufacturer's installation instructions. Dispose of condensate per local codes.
20
(Concentric Pipe)
Concentric
Concentric Pipe Example Vent Applications
Horizontal Wall Terminations
2 in. x 4 in.
3 in. x 5 in.
Concentric Pipe Maximum Vent Length
Concentric Vent Maximum Equivalent Length
Vent Sizes
Vent Lengths
•
45° elbow is equivalent to 3 ft (1 m)
•
90° elbow is equivalent to 6 ft (2 m)
Rinnai Commercial Hybrid System Installation and Operation Manual
Vertical Roof
Terminations
2 in. x 4 in.
and
3 in. x 5 in.
2 in. X 4 in.
3 in. X 5 in.
65 ft (20 m)
150 ft (46 m)
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